<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon=""
        :closable="false"
      >
      </el-alert>

      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- Tabs栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTapLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项目 -->
            <el-form-item
              v-for="item in manyTableData"
              :label="item.attr_name"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  :label="cb"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              v-for="item in onlyTableData"
              :label="item.attr_name"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action --表示图片要上传到的图片api接口地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :headers="headerObj"
              :on-success="handleSuccess"
              list-type="picture"
            >
              <el-button icon="el-icon-upload" size="small" type="primary"
                >点击上传</el-button
              >
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor
              v-model="addForm.goods_introduce"
              class="quillE"
            ></quill-editor>
            <el-button
              icon="el-icon-s-promotion"
              plain
              type="primary"
              class="addImg"
              @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="perviewVisible" width="50%">
      <img :src="perviewPath" alt="" class="perviewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'Add',
  data() {
    return {
      activeIndex: '0',
      //表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组
        goods_cat: [],
        //图片的数组
        pics: [],
        //商品的详情描述
        goods_introduce: '',
        //
        attrs: [],
      },
      //表单数据验证规则对象
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' },
        ],
      },
      //商品分类数据
      cateList: [],

      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      //动态参数列表数组
      manyTableData: [],
      //静态属性列表数组
      onlyTableData: [],
      //图片地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      perviewPath: '',
      perviewVisible: false,
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
  created() {
    this.getCateList()
  },
  methods: {
    //获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.cateList = res.data
    },
    //级联选择器变化出发函数
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat.length = []
      }
    },
    //切换tabs监听
    beforeTapLeave(activName, oldActivName) {
      if (oldActivName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.warning('请选择商品分类!')
        return false
      }
    },
    //Tabs点击事件
    async tabClicked() {
      //证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'many',
            },
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'only',
            },
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败')
        }
        this.onlyTableData = res.data
      }
    },
    //处理图片预览效果
    handlePreview(file) {
      this.perviewPath = file.response.data.url
      this.perviewVisible = true
    },
    //删除图片监听事件
    handleRemove(file) {
      // 1 --获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2 --从pics数组中，找到图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath)
      // 3 --调用数组splice方法把图片信息对象从pics数组中移除
      this.addForm.pics.splice(i, 1)
    },
    //监听图片上传成功的事件
    handleSuccess(response) {
      console.log('response', response)
      //1  --拼接 得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      //2  --将图片信息对象push到图片数组中
      this.addForm.pics.push(picInfo)
    },
    //上传商品
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        //执行添加业务逻辑
        //lodsh cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',') //从数组转成字符串
        //处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addForm.attrs.push(newInfo)
        })
        //处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        //发起请求添加商品 商品名称是唯一 的
        const { data: res } = await this.$http.post('goods', form)
        console.log('添加商品', res)
        if (res.meta.status !== 201) {
          this.$router.push('/notFound')
          return this.$message.error('添加商品失败！')
        }
        console.log('添加商品', res)
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    },
  },
}
</script>

<style scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.el-cascader {
  width: 250px !important;
}
.perviewImg {
  width: 100%;
}
.quillE {
  min-height: 300px !important;
  height: 300px;
}
.addImg {
  margin-top: 70px;
}
</style>